CN206201250U - TPU bottler placer mixing head B component pipelines force thermal - Google Patents

Abstract

TPU bottler placer mixing head B component pipelines force thermal, including substrate (1), fastening bolt (3), heating rod (4) and coiled pipe (5)；Substrate (1) middle part is provided with coiled pipe (5), and the both ends open of the coiled pipe (5) is picked out by substrate (1) edge, meanwhile, heating rod (4) is installed at substrate (1) middle part.B agent temperature is improved after and reaches 110~130 DEG C, B agent viscosity at 110~130 DEG C is greatly reduced compared to 80~90 DEG C, and less than 200mPa.s/120 DEG C is dropped to from original 150~1400mPa.s/80 DEG C；More preferable with A, C agent low viscosity raw material mixing dispersion effect, TPU product fisheyes are less.A grades of rate of TPU Product checking high-class products is lifted to more than 90% from original 60~70%.

Description

TPU bottler placer mixing head B component pipelines force thermal

Technical field

The utility model is related to TPUE to manufacture the structure improved technology of equipment, especially TPU Bottler placer mixing head B component pipeline forces thermal.

Background technology

TPU is the abbreviation of English name Thermoplastic polyurethanes, and Chinese is thermoplastic polyurethane Elastomer.It is a kind of linear block copolymers being made up of oligomer polyol soft section and diisocyanate-chain extender hard section, Oligomer polyol therein mainly include PEPA and the major class of PPG two, diisocyanate be based on MDI, Also TDI, IPDI, HDI etc..TPU is a relatively more special major class in elastomer, and its hardness range is very wide, i.e. 60HA- 85HD, performance range is wide in range, is the family macromolecule material between rubber and plastics, possess wear-resisting, oil resistant, it is transparent, elasticity it is good, The characteristic such as intensity is high, is widely used in daily necessities, industrial goods, sports goods, health care, ornament materials and military supplies Deng field.

Generally by bottler placer by diisocyanate, i.e., also referred to as component A, polyester are more for the industrial production building-up process of TPU First alcohol or PPG, also referred to as B component, oligomer diol chain extender, the also referred to as component primary raw material of component C three measure filling respectively Note, mixed at high speed enter response type double screw extruder, and reactive extrursion forms macromolecular compound, then through cooling and dicing under water Form.

In conventional one-step method polymerization TPU equipment, TPU raw material bottler placer B components temperature is usual at 80~90 DEG C, It is larger with A, component C viscosity differences, there is following defect：

1st, B agent about 150~1400mPa.s/80 DEG C of viscosity at 80~90 DEG C, far above A, C agent viscosity mPa.s/50 DEG C, viscosity differences are larger to cause quick mixing dispersion not uniform enough；

2nd, A, B, component C are three big primary raw materials of TPU polymerizations, and mixing dispersion is uneven to cause subsequent reactions polymer Soft and hard segments is uneven in molecular structure, and each molecule different melting points will bring to subsequent melt extrusion, curtain coating or injection molding " fisheye " and the flaw of " not melting particle ", influences product property.

At a certain temperature be incubated the storage of three component raw materials by bottler placer, to keep three kinds of raw materials in liquid condition, then Mixed at high speed head is delivered to by mass flowmenter, response type double screw extruder is entered after moment mixed at high speed.Bottler placer three The condition of storage of component raw material is respectively：Such as 40 DEG C~60 DEG C of pure MDI component As isocyanates, viscosity of MDI is big at a temperature of this About at 5mPa.s/50 DEG C, 80 DEG C~90 DEG C of B component PEPA or PPG, with PEPA at a temperature of this As a example by PBA1000, about 150mPa.s/80 DEG C of viscosity；Viscosity of PEPA PBA2000 is about at a temperature of this 600mPa.s/80℃；About 1400mPa.s/80 DEG C of the viscosity of PEPA PBA3000 at a temperature of this；Homogeneous structure it is poly- Viscosity is higher at the more big then identical temperature of ester polyol molecular weight；Such as 40 DEG C~60 DEG C of BDO BDOC components chain extender, Viscosity of BDO is not higher than 50mPa.s/50 DEG C at a temperature of this.Mixing head is exactly the liquids by this three kinds of different temperatures and viscosity The quick mixing of material, this mixing is a physical process, and the mechanism of mixing is exactly each component in whole volumes of whole system Refinement and distributed process in the case where its elementary cell does not occur essential change, the purpose of mixing be make original two kinds or Two or more each dispersed materials from a kind of material according to acceptable probability distribution to another material in, so as to Obtain constituting uniform mixture.But the state of mixed material is related to molecule diffusion, there is gas mixed with gas The mixing of the mixing, solid and solid of conjunction, liquid and liquid, comparatively, gas is most fast with gas mixing molecular diffusion rates, Next to that the mixing of liquid and liquid, when solid mixes with solid, molecular diffusion rates are extremely slow.And be equally that liquid is mixed with liquid Close, viscosity height also determine mixing degree of scatter, it is relative between low-viscosity (mobile) liquid to be easier to be well mixed.

The viscosity of component A MDI is about at 5mPa.s/50 DEG C in above-mentioned three component, B component PEPA or polyether polyols Alcohol about 600mPa.s/80 DEG C of viscosity, component C chain extender viscosity by taking BDO BDO as an example by taking the PBA2000 for commonly using as an example Not higher than 50mPa.s/50 DEG C.Three compositional viscosities differ greatly, and have viscosity close to the same MDI of water, also there is sticky poly- of viscosity Ester polyol, viscosity differences are larger certainly will to be influenceed to mix degree of scatter.

Agitator in three components perfusion blender is a screw thread gyroscope type structural detail：Agitator 835mm long, top Diameter 380mm, base diameter 250mm, screw thread depth 5.5mm, agitator speed 1000~3300rpm frequency conversions are adjustable, right angle setting, Outer shield protective case, material passes through only about 0.1 second this vertical agitator time.

Mixing dispersion is stirred in order to allow three components to pass through this agitator evenly fully, so needing to reduce the viscous of three components Degree height difference, A, component C viscosity are all within 50mPa.s/50 DEG C, and most of TPU kinds are all with diphenyl methane two Isocyanates MDI is as component A, using BDO BDO as component C, and B component PEPA or PPG kind Class is various, and it is low that viscosity has height to have, and viscosity all can be higher than A, component C.So, key is exactly that the temperature of B component is improved, from 80 ~90 DEG C bring up to 110~130 DEG C.The temperature for improving B component has two exercisable methods in theory：One is exactly to improve B Component reservoirs improve the temperature of material B agent with the jacket heat-preservation temperature of perfusion machine host bucket, and this is the universal idea of usual thinking. But the method has several drawbacks in that：One is that B agent may aggravate back reaction at these elevated temperatures, such as PEPA is hydrolyzed into acid And alcohol；Two be typically can may xanthochromia added with the additives such as antioxidant, ultra-violet absorber, lubricant, long-time high temperature in B agent And influence feature and TPU colourities；Three is that such high temperature certainly will need heating agent oil system, is typically chosen electrical heating, so relative Energy consumption cost is higher.

Utility model content

The purpose of this utility model is to provide TPU bottler placer mixing head B component pipelines and forces thermal, reduces B agent viscosity, Mixing dispersion effect is improved, so as to improve TPU fabricated product qualities.

The purpose of this utility model will be realized by following technical measures：Including substrate, fastening bolt, heating rod and snake Shape pipe；Substrate middle part is provided with coiled pipe, and the both ends open of the coiled pipe is picked out by substrate edges, meanwhile, substrate middle part is installed Heating rod.

Especially, point for measuring temperature is installed, point for measuring temperature head exposes substrate, and afterbody is stretched into substrate on substrate.

Especially, substrate has buckle relative with the heat-conducting plate of coiled pipe profile identical caulking groove by two pieces of opposite flanks Close constitute, coiled pipe be arranged on the caulking groove in and two ends stretch out outside substrate edges, and at substrate edges perforate and install tightly Fixing bolt.

Especially, substrate includes the spacing block of three-decker, i.e., the clamping plate in two outsides, and centre, and coiled pipe is arranged on In the gap be spliced into by multiple different shape spacing blocks, and, coiled pipe two ends are stretched out outside substrate edges, at substrate edges Perforate simultaneously installs fastening bolt, and the three-decker combination that will be clamped with coiled pipe tightens together.

Especially, substrate outside is covered with attemperator.

Especially, heating rod stretches out one end with snakelike pipe port not in the same side.

Especially, heating rod at least includes three, wherein two parts in substrate are respectively close to coiled pipe and port Be connected section.

Advantage of the present utility model and effect：B agent temperature is improved after device application and reaches 110~130 DEG C, B agent 110~ Viscosity is greatly reduced compared to 80~90 DEG C at 130 DEG C, and 200mPa.s/120 is dropped to from original 150~1400mPa.s/80 DEG C Below DEG C；More preferable with A, C agent low viscosity raw material mixing dispersion effect, TPU product fisheyes are less.A grades of TPU Product checking high-class products Rate is lifted to more than 90% from original 60~70%.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model embodiment 1.

Reference includes：

Substrate 1, point for measuring temperature 2, fastening bolt 3, heating rod 4, coiled pipe 5.

Specific embodiment

The utility model principle is, if causing mixing to disperse uneven, subsequent polymerisation reaction greatly because of viscosity differences Can be uneven.TPU processing procedures are a kind of random molten polymerisations, and diisocyanate reacts to form soft with polyester or PPG Section, isocyanates forms hard section with chain extender small molecule diol reaction, and soft section and hard section alternately pass through ammonia ester bond head and the tail and connect Connect formation rule structure.Reaction illustrates equation as follows：

If polymerisation is not uniform enough, each molecule Soft hard segment structure and proportional difference are big, and molecule different melting points are big, will Influence is brought to TPU processing, such as extrudes " fisheye " of processing or even containing particle is not melted, flaw and bad ratio are brought to product Example.So improve the method for B agent storage tank and main frame barrel temperature and do not apply to, because this method can cause B agent, such as polyester polyols The hydrolysis of alcohol, B agent and its wherein added with additive high temperature xanthochromia.

Principle of the present utility model is exactly that design is forced thermal and is installed in B agent priming lines, and application can reduce B The viscosity of agent, improves the temperature of B agent to reduce viscosity, but does not influence the quality of B agent, i.e., quickly supplemented in B agent priming lines Heating, closes perfusion and then stops heating.

The utility model includes：Substrate 1, fastening bolt 3, heating rod 4 and coiled pipe 5.

The utility model is described in further detail with reference to the accompanying drawings and examples.

Embodiment 1：As shown in Figure 1, the middle part of substrate 1 is provided with coiled pipe 5, and the both ends open of the coiled pipe 5 is by substrate 1 Edge is picked out, meanwhile, heating rod 4 is installed at the middle part of substrate 1.

In foregoing, point for measuring temperature 2 is installed on substrate 1, the head of point for measuring temperature 2 exposes substrate 1, and afterbody is stretched into substrate 1.

In foregoing, substrate 1 is had relative with the heat-conducting plate of the profile identical caulking groove of coiled pipe 5 by two pieces of opposite flanks Fasten and constitute, coiled pipe 5 is arranged in the caulking groove and two ends are stretched out outside the edge of substrate 1, and in the edge perforate of substrate 1 and pacifies Load fixing bolt 3.

In foregoing, substrate 1 includes the spacing block of three-decker, i.e., the clamping plate in two outsides, and centre, and coiled pipe 5 is installed In the gap being spliced into by multiple different shape spacing blocks, and, the two ends of coiled pipe 5 are stretched out outside the edge of substrate 1, in substrate 1 Edge perforate simultaneously installs fastening bolt 3, and the three-decker combination that will be clamped with coiled pipe 5 tightens together.

In foregoing, the outside of substrate 1 is covered with attemperator.

In foregoing, heating rod 4 stretches out one end and the port of coiled pipe 5 not in the same side.

In foregoing, heating rod 4 at least includes three, wherein two parts in substrate 1 are respectively close to coiled pipe 5 and end Mouth is connected section.

In the present embodiment, forcing thermal mainly includes two pieces of snakes that can be with the substrate 1 of pairing and clamping therebetween Shape pipe 5, the two ends of coiled pipe 5 are connected on B component raw material pipeline, used as must being somebody's turn to do through section for B component feedstock transportation pipeline B component raw material pipeline is connected with coiled pipe 5 by 6 points of internal thread interfaces；The power 4KW of heating rod 4, using external temperature control. The size of monolithic substrate 1 is 394.70mm long, width 281.18mm, thickness 37.34mm.Coiled pipe 5 is about 1500mm not for 6 points of internal diameter Rust steel pipe.Substrate 1 uses metal or synthetic resin heat carrier.

In the utility model, the B agent perfusion after supplementary heating will be forced to be mixed into extruder, without flowing back into main frame bucket, In case long-time high temperature is to B agent and its qualitative effects of additive.Device uses electrical heating, defeated installed in bottler placer B agent pipelines After sending pumping and mass flowmenter, before perfusion is mixed into twin-screw extrusion level mixing head, a switch is shared with perfusion.Opening Start heating during perfusion, perfusion then stops heating when stopping.The heating temperature-control system of heating rod 4 can adjust temperature within 180 DEG C. Viscosity is reduced to improve B agent temperature of charge, mixing dispersion effect is improved, makes polymerisation of the material in extruder more equal Even, " fisheye " of TPU products and " not melting particle " is less or avoids, and A grades of product rate of TPU superior qualities is greatly improved.

Claims (7)

1.TPU bottler placer mixing head B component pipelines force thermal, including substrate (1), fastening bolt (3), heating rod (4) and Coiled pipe (5)；Characterized in that, substrate (1) middle part is provided with coiled pipe (5), the both ends open of the coiled pipe (5) is by substrate (1) edge is picked out, meanwhile, heating rod (4) is installed at substrate (1) middle part.

2. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that substrate (1) Upper installation point for measuring temperature (2), point for measuring temperature (2) head exposes substrate (1), and afterbody is stretched into substrate (1).

3. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that substrate (1) Had by two pieces of opposite flanks and constituted with relative fastening of heat-conducting plate of coiled pipe (5) profile identical caulking groove, coiled pipe (5) In the caulking groove and two ends are stretched out outside substrate (1) edge, and in substrate (1) edge perforate and fastening bolt is installed (3)。

4. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that substrate (1) Including three-decker, i.e., the clamping plate in two outsides, and centre spacing block, coiled pipe (5) installed in by multiple different shapes every In the gap being spliced into from block, and, coiled pipe (5) two ends are stretched out outside substrate (1) edge, in substrate (1) edge perforate simultaneously Fastening bolt (3) is installed, the three-decker combination that will be clamped with coiled pipe (5) tightens together.

5. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that substrate (1) Outside is covered with attemperator.

6. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that heating rod (4) stretch out one end and coiled pipe (5) port not in the same side.

7. TPU bottler placers mixing head B component pipeline as claimed in claim 1 forces thermal, it is characterised in that heating rod (4) three are at least included, wherein two parts in substrate (1) are connected section respectively close to coiled pipe (5) with port.